I am 30, still young by most standards, but a little old in the gaming community. My family got an Apple IIe when I was 5 and I have been gaming ever since.
Actually, the average gamer age is apparently around 30-35.
True but, I think that younger gamers are more active in the hobby. More time to play, be active in the gaming community, read up on gaming news and the like, and less time spent, let's say working, doing yard work, changing diapers, etc... My gaming habits are very different from when I was 23.
But the overall point of the post is that there are some great games from the early 80s and early 90s that are still fun and playable by today standards and due to the progresss of the internet many of them are possible to track down today (which may not have been possible say 10 years ago) and if you think of a N64 as "Old school" (The kids still say that don't they...) you might not know about them.